Acoustics – Sound-modifying means – Muffler – fluid conducting type
Reexamination Certificate
2000-06-27
2002-04-23
Hsieh, Shih-Yung (Department: 2837)
Acoustics
Sound-modifying means
Muffler, fluid conducting type
C181S403000
Reexamination Certificate
active
06374943
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a hermetic reciprocating compressor, more particularly, a baffle plate of a discharge muffler for a hermetic reciprocating compressor, which reduces flow noise generated by high pressure refrigerant which is discharged through a discharge chamber of a cylinder head into the discharge muffler.
2. Description of the Related Art
Generally, a hermetic reciprocating compressor is operated to compress a refrigerant at a high pressure and a high temperature through a refrigerating cycle and discharge the refrigerant out of a housing of the hermetic reciprocating compressor. In the refrigerating cycle, the refrigerant is sequentially compressed, condensed, expanded and evaporated.
As shown in
FIGS. 4-6
, a conventional hermetic reciprocating compressor comprises a sealed housing
10
which is divided into an upper housing
11
and a lower housing
12
, a driving part
20
which is disposed in the sealed housing
10
and a compressing part
30
which receives a driving force from the driving part
20
so as to suck and compress a refrigerant.
The driving part
20
is disposed at an upper portion of the sealed housing
10
and is provided with a stator
21
which is fixed to a cylinder block
32
in the lower housing
12
, a rotor (not shown) which generates a magnetic field and a rotational shaft
22
which is rotatably coupled to the rotor and is integrally formed with an eccentric shaft
23
at a lower portion thereof.
In addition, the compressing part
30
is mounted at the lower housing
12
and comprises a cylinder head
31
which is formed with a suction chamber (not shown) and a discharge chamber (not shown) for guiding the refrigerant which is sucked and discharged, the cylinder block
32
which a compressing chamber (not shown) is provided therein, a piston (not shown) which is reciprocated in the compressing chamber and a connecting rod
33
which connects the piston with the eccentric shaft
23
and converts a rotational motion into a rectilinear motion.
On an upper portion of the cylinder head
31
, there is provided a suction muffler
40
in which an inlet port
41
is formed. The inlet port
41
guides the refrigerant to the cylinder head
31
and excludes a noise which is generated upon refrigerant introduction. The suction muffler
40
is connected with a refrigerant guiding pipe
50
which guides the refrigerant introduction from an external portion of the sealed housing
10
.
Meanwhile, on both ends of the cylinder block
32
, there are respectively provided discharge mufflers
80
each of which is communicated through a communicating aperture
60
with the discharge chamber of the cylinder head
31
. The discharge muffler
80
is served as a noise excluding device which reduces a flow noise due to the discharging of the high pressure refrigerant.
In such hermetic reciprocating compressor, when power source is applied, the compressing part
30
and the driving part
20
are operated.
That is, the stator
21
and the rotor are reciprocally acted so that the rotational shaft
22
is rotated along with the rotor. The piston, which is connected through the connecting rod
33
with the eccentric shaft
22
of the rotational shaft, is reciprocated in the compressing chamber. The refrigerant is sucked through the suction muffler
40
and the suction chamber of the cylinder head
31
, and compressed at a high pressure, and then discharged through the discharge chamber of the cylinder head
31
and the communicating aperture
60
to the discharge muffler
80
.
In the discharging process of the refrigerant, when the piston is moved to a bottom dead point, the refrigerant is sucked at a low pressure. And when the piston is moved to an upper dead point, the refrigerant is compressed at a high temperature and sequentially discharged to the discharge chamber of the cylinder head
31
.
Then, the refrigerant is discharged through the communicating aperture
60
to the discharge muffler
80
. Eventually, the compressed refrigerant is discharged from the muffler
80
through a discharge pipe
86
communicated with an inner portion of the discharge muffler
80
to the outside of the sealed housing
10
.
The discharge muffler
80
temporarily stores the high pressure refrigerant so as to reduce the discharge noise, as shown in
FIGS. 4
to
6
. That is, on each end of the cylinder block
32
, there is provided an installing part
70
on which the discharge muffler
80
is mounted. An aperture
71
having a thread therein is formed at a center portion of the installing part
70
.
And, the discharge muffler
80
is coupled to the installing part
70
. The discharge muffler
80
includes a hemispherical cover
81
which is coupled to the installing part
70
so as to form an inner space and a hemispherical baffle plate
82
which divides the inner space into an upper part and a lower space. The baffle plate
82
is recessed downward.
In addition, on each upper and lower part of an outer circumference, there is provided a gasket
83
for preventing a leakage of the refrigerant. The baffle plate
82
and the cover
81
are respectively formed with a bolt hole
84
,
85
at center portion thereof.
Therefore, the upper space of the discharge muffler
80
is communicated through the communicating aperture
60
with the discharge chamber of the cylinder head
31
so that the high pressure refrigerant is introduced. The refrigerant is then introduced through the bolt hole
84
of the baffle plate
82
into the lower space of the discharge muffler
80
so as to be temporarily stored therein.
And, the discharge pipe
86
for guiding the high pressure refrigerant to the outside of the sealed housing
10
is connected with the cover
81
.
The installing order of the discharge muffler
80
will be described more fully. First, the hemispherical baffle plate
82
having the upper and lower gaskets
83
is fitted with the hemispherical cover
81
of the discharge muffler
80
. The cover
81
and baffle plate
82
are fixed to the cylinder block
32
by a bolt
90
provided with a washer
91
which is screwed through the bolt holes
84
,
85
.
Therefore, the discharge muffler
80
is formed with the inner space between the installing part
70
of the cylinder block
32
and the cover
81
. Further, the inner space is divided into the upper space and the lower space by the baffle plate
82
. Thus, when the high pressure refrigerant is discharged through the communication aperture
60
from the discharge chamber, the flow noise due to a different of flow speed of the refrigerant is reduced in the muffler. Then, the refrigerant is discharged through the discharge pipe
86
connected with a lower portion of the cover
81
to the outside.
However, since the inner space of the discharge muffler
80
is simply partitioned into the upper and lower spaces, there is a limit to the reducing of the noise which is generated when the high pressure and the high temperature refrigerant is discharged. Therefore, there is a problem that the vibration and noise by the high pressure refrigerant is directly transmitted to a refrigerating cycle.
SUMMARY OF THE INVENTION
It is therefore an object of the present invention to provide a baffle plate of a discharge muffler for a hermetic reciprocating compressor, which is provided with a duct extended to the cover at a center of a baffle plate thereof so as to increase a reducing efficiency of flow noise.
To achieve the above objects and other advantages, there is provided a baffle plate of a discharge muffler for a hermetic reciprocating compressor which is mounted in an inner portion of the discharge muffler mounted at a lower portion of a cylinder block so as to reduce flow noise of a refrigerant discharged to a discharge pipe, characterized in that an extended duct, which is communicated from a center portion of the baffle plate to the discharge pipe and has a diameter, is formed during a press molding.
REFERENCES:
patent: 3811251 (1974-05-01), Gibel
patent: 5196654 (1993-03-01), Di Flora
Hsieh Shih-Yung
Samsung Kwangju Electronics Co., Ltd.
LandOfFree
Baffle plate of discharge muffler for hermetic reciprocating... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Baffle plate of discharge muffler for hermetic reciprocating..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Baffle plate of discharge muffler for hermetic reciprocating... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2909774